EP1138465B1 - Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers - Google Patents

Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers Download PDF

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Publication number
EP1138465B1
EP1138465B1 EP00830243A EP00830243A EP1138465B1 EP 1138465 B1 EP1138465 B1 EP 1138465B1 EP 00830243 A EP00830243 A EP 00830243A EP 00830243 A EP00830243 A EP 00830243A EP 1138465 B1 EP1138465 B1 EP 1138465B1
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EP
European Patent Office
Prior art keywords
plate
support structure
elements
spindle
tubular article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00830243A
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English (en)
French (fr)
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EP1138465A1 (de
Inventor
Ugo Ferri
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VEM SpA
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VEM SpA
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Publication date
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Priority to DE60004962T priority Critical patent/DE60004962D1/de
Priority to AT00830243T priority patent/ATE248704T1/de
Priority to EP00830243A priority patent/EP1138465B1/de
Publication of EP1138465A1 publication Critical patent/EP1138465A1/de
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Publication of EP1138465B1 publication Critical patent/EP1138465B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/607—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels having driving means for advancing the wound articles, e.g. belts, rolls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
    • B29K2309/08—Glass

Definitions

  • the present invention relates to an apparatus for manufacturing a tubular article of composite material comprising the features set forth in the preamble of claim 1.
  • the invention also relates to a process for manufacturing a tubular article of composite material comprising the features set forth in the preamble of claim 13.
  • tubular articles find application, for example, in making drinkable-water and irrigation-water pipelines, low- and high-pressure piping, pipelines for industrial appliances or others.
  • the invention can apply to apparatus and/or machinery intended for making tubular articles of composite material obtained through winding up of a continuous fibre band, of glass filaments for example, incorporated into a resin layer or another binding matrix.
  • these apparatus comprise a spindle consisting of a cage-shaped support structure arranged to support a tubular article being formed.
  • the cage-shaped support structure substantially is of cylindrical form and can be driven in rotation around its own longitudinal axis.
  • a continuous ribbon of metal material is wound up in concentric coils disposed consecutively in mutual side by side relationship, to form an outer skirt of the support structure.
  • the continuous ribbon has an advancing portion defined by a spirally wound ribbon length and a return portion defined by a substantially rectilinear ribbon length extending internally of the support structure from one end to the opposite end of same.
  • movement members adapted to pull the continuous ribbon from end to end of the advancing portion, in such a manner that each part of the continuous ribbon cyclically and continuously goes along the spiral length of the advancing portion and the rectilinear length of the return portion.
  • the material for formation of the tubular article which usually consists of thread-like elements made of plastic reinforced by fibre glass, is applied to the continuous ribbon and, more particularly, to the advancing portion of said ribbon. These thread-like elements are wound up around the continuous ribbon and the support structure, thereby forming the tubular article which is moved away from the formation region.
  • Document FR-A-2042045 discloses an apparatus comprising a spindle having a support structure mounted idle on a fixed shaft horizontally extending from a base, a skirt formed by plate-like elements slidably guided on the support structure, and a driving device connected with said plate-like elements to transmit a reciprocating axial motion to the latter when the mandrel is driven in rotation.
  • the material for formation of the tubular article is wound around both the mandrel and a motorized rotating shaft parallely offset with respect to the mandrel. The motion caused to the forming material by the rotating shaft is transmitted to the mandrel, which is consequently driven in rotation.
  • the Applicant has found that the apparatuses for the manufacture of known tubular articles have some drawbacks and can be improved from different points of view, mainly in connection with the advancing system of the tubular article being formed, as well as the possibility of making tubular articles having a diameter smaller than 250 mm.
  • Another object of the present invention is to propose an apparatus enabling manufacture of tubular articles of a diameter smaller than 250 mm.
  • a further object of the present invention is to reduce times required for arrangement of the apparatus to produce articles of a different diameter from that of the article into production.
  • a spindle for manufacturing a tubular article of composite material in accordance with the present invention has been generally identified by reference numeral 1.
  • the present invention can be applied to an apparatus, device or machinery (Fig. 2) intended for production of tubular elements of composite material, such as plastic reinforced by fibre glass and the like, for example.
  • This apparatus generally denoted by 2, contemplates manufacture of at least one continuous tubular article 2a through winding up around spindle 1 of one or more glass filaments, possibly gathered to form a continuous band or ribbon or strap and incorporated into a layer of resin, a thermoplastic or thermosetting resin for example, or into another binding matrix.
  • apparatus 2 comprises a base 3 having a lower portion 3a enabling the base 3 to steady rest on a support surface 4 and an upper portion 3b extending over the lower portion 3a and from which spindle 1 laterally extends in cantilevered fashion.
  • held within the upper portion 3b are all components necessary for actuation of spindle 1.
  • spindle 1 is mechanically connected with a motor located within the upper portion 3b of base 3 through a connecting end 1a. When the motor is started, spindle 1 is consequently driven in rotation around its own rotation axis "X".
  • Deposition means 5 for application of a material designed to form the tubular article 2a into production is also operatively associated with spindle 1.
  • This deposition means 5 is suspended over spindle 1 and is arranged to act on an application region 6 of said spindle 1 which is close to the connecting end 1a of the latter, and to wind the material up around spindle 1 for formation of the tubular article 2a.
  • the simultaneous operations of winding the material up around spindle 1 and moving it forward involves formation of the continuous tubular article 2a the length of which increases as the production process goes on.
  • the deposition means 5 can be associated with a movable carriage or equivalent devices for transmitting a reciprocating motion parallel to spindle 1 to said means 5.
  • the carriage bearing the deposition means 5 is driven in a reciprocating motion at high speed away from and close to the connecting end 1a of spindle 1, causing deposition of the material filaments to give rise to a material formation according to a substantially longitudinal orientation.
  • the reciprocating motion of the deposition means 5 enables formation, helically around spindle 1, of a wide band of material having its own fibres or sheets disposed in alternated lengths oriented substantially in a direction parallel to the longitudinal axis "X" of spindle 1.
  • Apparatus 2 also involves the presence of a furnace 8 or similar heating device identified by a chain line in Fig. 2, through which the tubular article 2a formed on spindle 1 is designed to pass.
  • furnace 8 the material forming the tubular article structure polymerizes into its final configuration.
  • spindle 1 comprises a support structure 9 substantially constituting the spindle core and a skirt 10 circumscribing the support structure 9.
  • Skirt 10 has a substantially continuous outer surface 11 arranged to receive the material for formation of the tubular article 2a.
  • skirt 10 comprises a plurality of plate-like elements 12 slidably guided on the support structure 9 and disposed circumferentially in mutual side by side relationship to form the continuous outer surface 11.
  • the advancing means 7 is carried by spindle 1. More specifically, the advancing means 7 comprises at least one driving device 13 connected with the plate-like elements 12 to transmit a reciprocating motion to said elements along a direction substantially parallel to the longitudinal axis "X" of the support structure 9.
  • the motion of each plate-like element 12 is defined by a forward stroke involving moving of the plate-like element 12 away from the connecting end 1a, and a backward or return stroke, in the opposite direction with respect to the forward stroke and involving moving of the plate-like element 12 close to the connecting end 1a.
  • the driving device 13 is arranged to cause the forward stroke of at least one plate-like element 12 simultaneously with the return stroke of at least another plate-like element 12.
  • the driving device 13 simultaneously transmits the forward stroke to a number of plate-like elements 12 greater than the number of plate-like elements 12 carrying out the return stroke thereby ensuring moving forward of the material for formation of the tubular article 2a.
  • the driving device 13 comprises at least one fixed element 14 circumscribing the support structure 9 of spindle 1, carrying at least one circumferential guide cam 15 interacting with an end 12a of each plate-like element 12 to cause the reciprocating motion thereof.
  • the fixed element 14 has a first end 14a rigidly connected to the upper portion 3b of base 3 and a second end 14b terminating with the circumferential guide cam 15.
  • the circumferential guide cam 15 projects by its surface from the fixed element 14 and each plate-like element has at least one guide seating 12b formed at its end 12a to operatively engage the circumferential guide cam 15.
  • each plate-like element 12 operatively engaged in the end 12a of each plate-like element 12 are rolling elements 16 engaging the circumferential guide cam 15 at respectively opposite sides.
  • the circumferential guide cam 15 constitutes a circumferential sliding track for each plate-like element 12, that, upon driving in rotation of spindle 1, has the rolling elements 16 rolling on the circumferential guide cam 15.
  • the circumferential guide cam 15 may consist of a circumferential groove formed in the fixed element 14 in which the ends 12a of the respective plate-like elements 12 engage either directly or indirectly through intermediate elements.
  • the circumferential guide cam 15 has at least one first and one second consecutive helical lengths 15a, 15b causing the forward and return strokes respectively of each plate-like element 12.
  • the circumferential guide cam 15 has two or more first helical lengths 15a sequentially and circumferentially alternated with two or more second helical lengths 15b.
  • the first helical lengths 15a extend, with respect to a circumferential reference line "Z" shown in chain line in Fig. 3, with an inclination opposite to the inclination of the second lengths 15b.
  • the inclination line of each first length 15a by intersecting the circumferential reference line “Z” defines an angle of inclination " ⁇ " of a lower width than that of an angle of inclination " ⁇ ” defined by the intersection of the inclination line of each second length 15b with the circumferential reference line “Z”, so that the return stroke of each plate-like element 12 is quicker than the forward stroke of same.
  • the coupling means 17 interposed between the support structure 9 and the skirt 10 is coupling means 17 to drive in rotation the plate-like elements 12 of the skirt 10 integrally with the support structure itself.
  • the coupling means 17 comprises interconnecting elements 18 removably fastened to the support structure 9 and rotating together with at least one plate-like element 12.
  • Each interconnecting element 18 has an outer surface 19 in which slide seatings 20 are formed which substantially extend in a direction parallel to the longitudinal axis "X" of the support structure 9 and each plate-like element 12 has at least one sliding element 21 insertable in the respective slide seating 19 of the interconnecting element 18.
  • each slide seating 20 and each sliding element 19 has a substantially dovetail-shaped outline. It should be however considered that the slide seatings 20 and sliding elements 19 can extend following any profile ensuring one degree alone of freedom, i.e. sliding of the respective plate-like element 12 in a mainly longitudinal direction.
  • the slide seatings 20 can be provided to be formed directly in the outer surface of the support structure 9 in such a manner that the sliding elements 12 are slidably guided directly thereon without interposition of any interconnecting element 18.
  • each plate-like element 12 is driven in rotation around the longitudinal axis "X" by the interconnecting elements 18 and interacts, by its respective end 12a, with the circumferential guide cam 15 to carry out an axial backwards and forwards translation.
  • the guide seating 12b of each plate-like element 12 cyclically goes along the circumferential guide cam 15 which is fixed. Under this situation, the guide seating 12b of each plate-like element 12 follows the outline of the circumferential guide cam 15 so that both the first helical lengths 15a and the second helical lengths 15b are concerned.
  • the plate-like elements 12 are circumferentially distributed around the longitudinal axis "X", some of them engage, by their guide seating 12b, the first helical lengths 15a while others engage the second helical lengths 15b. Accordingly, a preestablished number of plate-like elements 12 carries out the forward stroke simultaneously with a preestablished number of plate-like elements 12 carrying out the return stroke. In detail, it is preferable that the number of plate-like elements 12 carrying out the forward stroke should be greater than the number of the plate-like elements 12 carrying out the return stroke, so that the tubular article 2a being formed moves forward as the formation material is laid down on spindle 1.
  • the application means 5 lays down the material for formation of the tubular article 2a on the application region 6 of spindle 1.
  • the continuous material is wound up on the skirt 10 of spindle 1 by effect of the rotation of same while it is moving towards the last end 1b upon the action of the plate-like elements 12 carrying out the forward stroke. More specifically, moving forward of the material for formation of the tubular article is caused by the movement of the plate-like elements 12 during their forward stroke, which elements move at a relatively reduced speed accompanying with their movement the material laid down on the spindle.
  • each plate-like element 12 carries out its return stroke at a higher speed than its forward stroke, in such a manner that it slides within the tubular article 2a formed on spindle 1 without causing any important dragging action thereon.
  • the tubular article 2a goes on increasing its length as the production process continues, until it projects from the last end 1b of spindle 1 and is engaged on support elements 22 disposed downstream of the spindle itself.
  • the invention solves all problems encountered in the known art and shows important advantages.
  • the advancing system being the object of the present invention enables achievement of a compact and practical spindle as regards dismantling and reassembling of same when tubular articles having diameters and/or thicknesses different from those of the tubular article into production are required to be produced.
  • the apparatuses provided with such a spindle are greatly lightened in their structure because the advancing system of the tubular article is directly carried by the spindle which constitutes an integral part thereof.
  • tubular articles of a diameter greatly smaller than 250 mm, until values even lower than about 80 mm, can be made.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)
  • Golf Clubs (AREA)

Claims (16)

  1. Vorrichtung zur Herstellung eines rohrförmigen Verbundkörpers, umfassend:
    ein Untergestell (3);
    einen Antrieb;
    eine Spindel (1), die wirksam am Untergestell (3) in Eingriff steht und um die eigene Längsachse ("X") drehantreibbar ist;
    Ablegemittel (5), die der Spindel (1) wirksam zugeordnet sind, um Material zur Bildung eines rohrförmigen Verbundkörpers in einem Auftragbereich (6) der Spindel (1) anzubringen;
    wobei die Spindel umfasst:
    eine Tragstruktur (9),
    einen Mantel (10), der die Tragstruktur (9) umschreibt und eine Außenfläche ()11) aufweist, die bereitgestellt ist, Material zur Bildung eines rohrförmigen Verbundkörpers im Auftragbereich (6) aufzunehmen,
    Vorschubmittel (7), die auf den Mantel (10) wirken, um das Material zur Bildung des rohrförmigen Verbundkörpers vom Auftragbereich (6) zu entfernen;
    wobei der Mantel (6) eine Vielzahl von Plattenteilen (12) umfasst, die auf der Tragstruktur (9) verschiebbar geführt und längs des Umfanges aneinander gereiht sind,
    wobei die Vorschubmittel (7) mindestens eine Betätigungsvorrichtung (13) umfassen, die mit den Plattenteilen (12) verbunden ist, um diesem letzteren eine Hin- und Herbewegung längs einer im wesentlichen zur Längsachse ("X") der Tragstruktur (9) parallelen Richtung zu übertragen, dadurch gekennzeichnet, dass die Tragstruktur (9) mit dem Motor mechanisch verbunden ist, um, um die eigene Längsachse ("X") drehangetrieben zu werden, wobei Verbindungsmittel (17) zwischen der Tragstruktur (9) und dem Mantel (10) liegen, um die Plattenteile (12) des Mantels (10) drehfest mit der Tragstruktur (9) zu vereinen.
  2. Spindel nach Anspruch 1, bei der die Betätigungsvorrichtung (13) einen Hinhub mindestens eines Plattenelementes (12) simultan mit einem Rückhub mindestens eines weiteren Plattenelementes (12) festlegt.
  3. Spindel nach Anspruch 1, bei der die Betätigungsvorrichtung (13) simultan den Hinhub einer Anzahl von Plattenteilen (12) überträgt, die größer ist als die Anzahl der Plattenteile (12), die den Rückhub bewirken.
  4. Vorrichtung nach Anspruch 1, bei der die Verbindungsmittel (17) mindestens ein Verbindungselement (18) umfassen, das an der Tragstruktur (9) und drehfest mit einem der Plattenteile (12) befestigt ist.
  5. Vorrichtung nach Anspruch 4, bei der die Plattenteile (12) auf mindestens einem Verbindungselement (18) verschiebbar geführt sind.
  6. Vorrichtung nach Anspruch 4, bei der das Verbindungselement (18) eine Außenfläche (19) aufweist, auf der Gleitsitze (20) ausgenommen sind, die sich parallel zur Längsachse ("X") der Tragstruktur (9) erstrecken, und wobei jeder Plattenteil (12) mindestens ein Gleitelement (21) aufweist, das in den entsprechenden Gleitsitz (20)des Verbindungselementes (18) einführbar ist.
  7. Vorrichtung nach Anspruch 6, bei der die Gleitsitze (20) und die Gleitelemente (21) im Querschnitt ein im wesentlichen schwalbenschwanzförmiges Profil aufweisen.
  8. Vorrichtung nach Anspruch 1, bei der die Betätigungsvorrichtung (13) mindestens ein festes Element (14) umfasst, das die Tragstruktur (9) umschreibt und mindestens einen Führungsnocken (15) längs des Umfanges trägt, der mit einem Ende (12a) eines jeden Plattenteiles (12) zusammenwirkt, um dessen Hin- und Herbewegung zu bewirken.
  9. Vorrichtung nach Anspruch 8, bei der der Führungsnocken (15) längs des Umfanges aus der Oberfläche des festen Elementes (14) vorspringt.
  10. Vorrichtung nach Anspruch 8, bei der der Führungsnocken (15) längs des Umfanges mindestens einen ersten und zweiten schraubenlinienförmigen Abschnitt (15a, 15b) aufweist, die aufeinanderfolgen und jeweils den Hin- und Rückhub eines jeden Plattenteils (12) bewirken, der auf der Tragstruktur (9) verschiebbar geführt ist.
  11. Vorrichtung nach Anspruch 10, bei der die ersten schraubenlinienförmigen Abschnitte (15a) gegenüber einer Referenzumfangslinie ("Z") des festen Elementes eine Neigung (α) aufweisen, die gegenüber einer Neigung (β) kleiner und abgewandter Ausrichtung ist, die auf zweiten schraubenlinienförmigen Abschnitten (15b) erfassbar ist, wodurch der Rückhub eines jeden Plattenteils (12) schneller als der Hinhub ist.
  12. Vorrichtung nach Anspruch 9, bei der das Ende (12a) eines jeden Plattenteils (12) mindestens einen Führungssitz (12b) aufweist, der den Führungsnocken (15) längs des Umfanges wirksam ergreift, um längs der Tragstruktur (9) verschoben zu werden.
  13. Verfahren zur Herstellung eines rohrförmigen Verbundkörpers, dadurch gekennzeichnet, dass es folgende Reihenfolge von Schritten umfasst:
    Drehantreiben einer Tragstruktur (9) einer Spindel (1) um die eigene Längsachse ("X") herum;
    Anbringen eines Materials zur Bildung eines rohrförmigen Verbundkörpers, in einem Auftragbereich (6), der auf einer Außenfläche (11) eines Mantels (10) festgelegt ist, welche die Tragstruktur (9) umschreibt;
    Verstellen des Materials zur Bildung des rohrförmigen Verbundkörpers längs der Tragstruktur (9) vom Auftragbereich (6) weg;
    bei dem die Verstellung des Materials zur Bildung des rohrförmigen Verbundkörpers über die Bewegung einer Vielzahl von Plattenteilen (12) durchgeführt wird, die längs des Umfanges aneinandergereiht ist, um den Mantel (10) gemäß einer geradlinigen im wesentlichen zur Längsachse ("X") parallelen Hin- und Herbewegung zu bilden.
  14. Verfahren nach Anspruch 13, bei dem die Bewegung eines jeden Plattenteils (12) durch einen Hinhub und durch einen Rückhub festgelegt ist, und bei dem mindestens ein Plattenteil (12) den Hinhub simultan mit dem Rückhub mindestens eines anderen Plattenteils (12) durchführt.
  15. Verfahren nach Anspruch 14, bei dem der Rückhub eines jeden Plattenteils (12) schneller als der Hinhub durchgeführt wird.
  16. Verfahren nach Anspruch 14, bei dem die Anzahl der Plattenteile (12), die den Hinhub durchführen, größer ist als die Anzahl der Plattenteile (12), die den Rückhub ausführen.
EP00830243A 2000-03-31 2000-03-31 Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers Expired - Lifetime EP1138465B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE60004962T DE60004962D1 (de) 2000-03-31 2000-03-31 Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers
AT00830243T ATE248704T1 (de) 2000-03-31 2000-03-31 Vorrichtung und verfahren mit einem spindelelement zur herstellung eines rohrförmigen verbundkörpers
EP00830243A EP1138465B1 (de) 2000-03-31 2000-03-31 Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP00830243A EP1138465B1 (de) 2000-03-31 2000-03-31 Vorrichtung und Verfahren mit einem Spindelelement zur Herstellung eines rohrförmigen Verbundkörpers

Publications (2)

Publication Number Publication Date
EP1138465A1 EP1138465A1 (de) 2001-10-04
EP1138465B1 true EP1138465B1 (de) 2003-09-03

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EP (1) EP1138465B1 (de)
AT (1) ATE248704T1 (de)
DE (1) DE60004962D1 (de)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITTO20010669A1 (it) * 2001-07-10 2003-01-10 Ctc Di Claus Claudio S A S Com Dispositivo per formare in modo continuo e con passo di avanzamento variabile articoli e manufatti tubolari in materiali compositi.
EP2033765A1 (de) * 2007-09-07 2009-03-11 Vem S.P.A. Dorn zur Bereitstellung eines röhrenförmigen Artikels
PL245056B1 (pl) 2021-10-26 2024-04-29 Siec Badawcza Lukasiewicz Przemyslowy Inst Automatyki I Pomiarow Piap Urządzenie do wytwarzania rur kompozytowych

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2042016A5 (en) * 1969-01-21 1971-02-05 Goodrich Co B F Plastic hoses

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DE60004962D1 (de) 2003-10-09
ATE248704T1 (de) 2003-09-15

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